WO2004058366A1

WO2004058366A1 - Shoe with inline skate

Info

Publication number: WO2004058366A1
Application number: PCT/KR2003/002713
Authority: WO
Inventors: Hong-Kil Lee
Original assignee: Hong-Kil Lee
Priority date: 2002-12-24
Filing date: 2003-12-11
Publication date: 2004-07-15
Also published as: CN1509789A; AU2003303371A1; JP2004305700A; CN1265856C

Abstract

There is provided a shoe with an inline skate, which can be used as an ordinary shoe in a normal walking and as an inline skate as needed. The shoe includes: a boot including a body and a sole integrally attached to the underside of the body and having a receiving groove; a cover insertedly installed in the receiving groove; and a roller device including a housing detachably equipped in the cover, a front driving unit movably insertedly installed in front of the housing, a rear driving unit movably insertedly installed in rear of the housing, an linkage fixed to the housing, for moving the front driving unit in combination with the rear driving unit, front wheel assembly and rear wheel assembly respectively equipped in the front driving unit and the rear driving unit rotatably in an opposite direction, and a manipulating unit for operating the rear driving unit.

Description

SHOE WITH INLINE SKATE

Technical Field

The present invention relates to a shoe with an inline skate, and more particularly, to a shoe with an inline skate, in which a wheel assembly is possibly protruded out of the shoe toward the ground for in-line skating or roller blading as needed while normally wearing the shoe as an ordinary shoe.

Background Art An in-line skate generally called a roller blade is widely being used by various ages of people as well as children for sports or recreation, etc. The roller blade, as shown in Fig. 1, includes a boot type shoe 1 which a user wears and a wheel blade assembly 2 fixably installed on the bottom of the shoes 1. The wheel blade assembly 2 includes a runner or a blade 3 fixably installed in the boot 1 , and four or five of rollers or wheels 5 rotatably fixed to the blade 3 by a shaft 4 with uniformly distanced each other. According to the structure as above, a user who wears the boot 1 can play roller blading or in-line skating just like the way same as ice skating.

However, skating by the way described as above results in many inconveniences and problems. First, as a condition of the ground to skate, a user can normally enjoy skating on the rigid and flat paved ground such as asphalt or concrete, etc. Next, as inconvenience of carrying, a user should always carry a roller blade separately, and thus, after playing skating or when passing through a non-flat area, he or she takes off his or her shoes and changes into an ordinary shoe. That is, the user should change his or her shoes according to the cases of wearing either a roller blade or an ordinary shoes, and thus, the user should always carry the other one which is not used separately, which results in causing inconveniences and extra expenses to purchase two shoes separately. The U.S. Patent No. 6,042,125 discloses a boot together with which a roller device is installed as needed and which can be also used as an in-line skate as one example of a conventional art. The in-line skate has a roller device detachably installed therein. However, the in-line skate is not easy for a user to handle, and its outer look is not compact so that the wearing of the skate as an ordinary shoe brings difficult problems.

In addition, the shoe with the inline skate provided with an expansion type roller, has a difficulty in exchanging or repairing the roller device after the roller device is installed in the shoe. Accordingly, the present invention is directed to a shoe with an inline skate that substantially obviates one or more problems due to limitations and disadvantages of the related art.

Disclosure of the Invention An object of the present invention is to provide a shoe with an inline skate which can be used as an ordinary shoe in a normal walking, and be converted into an inline skate so that a user can enjoy stable inline skating when the user wishes to use the shoe as the inline skate.

Another object of the present invention is to provide a shoe with an inline skate, provided with a roller device enabling rapid and easy conversion between the shoe function and the roller blade function.

A further object of the present invention is to provide a shoe with an inline skate in which the roller device can be manufactured simply, and its repair and maintenance are easy and rapid. Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a shoe with an inline skate, which can be used as an ordinary shoe in a normal walking and as an inline skate as needed. The shoe includes: a boot including a body adapted to receive a foot of a user and a sole integrally attached to the underside of the body and having a receiving groove in a longitudinal direction; a cover insertedly installed in the receiving groove; and a roller device including a housing detachably equipped in the cover, a front driving unit movably insertedly installed in front of the housing, a rear driving unit movably insertedly installed in rear of the housing, an linkage fixed to the housing, for moving the front driving unit in combination with the rear driving unit in an opposite direction to each other, front wheel assembly and rear wheel assembly respectively equipped in the front driving unit and the rear driving unit rotatably in an opposite direction, and a manipulating unit for operating the rear driving unit.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Brief Description of the Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

FIG 1 is a side view of a conventional general in-line skate;

FIG. 2 is a perspective view of a shoes with a roller device of the present invention showing the state that a wheel assembly of the shoes is protruded;

FIG. 3 is an exploded perspective view of a roller device employed in the shoes of FIG 2;

FIG 4 is a detailed perspective view of a stopper of the roller device of FIG 3; FIG. 5 is a front perspective view of a first link of each wheel assembly of the roller device of FIG 3;

FIG 6 is a back perspective view of the first link of FIG 5;

FIG. 7 is a perspective view showing the structure of a side part of a second link of each wheel assembly of the roller device of FIG 3; FIG. 8 is an exploded perspective view of a switch employed in the roller device of FIG 3;

FIG 9 is a perspective view of a brake employed in the body;

FIG. 10 a side view of the state of the roller device when the shoes is used as an ordinary shoes; FIG. 11 is a side view of the moving state of the stopper when the shoes is changed from an ordinary shoes to a skate;

FIG 12 is a side view of the state of the roller device for the use of skating;

FIG. 13 is a perspective view of the installed state of the brake for the use of skating; FIG 14 is an exploded perspective view of the roller device employed in the shoes according to another embodiment of the present invention;

FIG. 15 is a detailed perspective view of the stopper of the roller device of FIG. 14;

FIG. 16 is a side view of the state of the roller device for the use of an ordinary shoes;

FIG. 17 is a side view of the moving state of the stopper when the shoes is changed from an ordinary shoes to a skate; FIG 18 is a side view of the state of the roller device for the use of skating; and FIG. 19 is a perspective view of the state that the wheel is completely protruded from the bottom of the shoes for the use of skating.

Best Mode for Carrying Out the Invention

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

First, referring to FIGs. 2a, 2b and 3, a shoe with an inline skate according to the invention is provided with a boot 210 adapted to receive a foot of a user or a skater. The boot 210 includes a body 212 into which a foot of a user is received, and a sole 214 integrally formed below and with the body 212. The sole 214 has therein a receiving groove 216 into which roller device to be described later in detail is inserted. Also, at the rear of the sole 214, a groove 218 which permits the left and right movement of the lever of a manipulating unit to be described later is provided. As shown in detail in FIG. 3 to FIG. 5b, a cover 220 is inserted in the sole 214 of the boot 210 shown in FIGs. 2a and 2b for stable and smooth installation of roller device to be described later. The cover 200 can be formed of various materials, such as metal or synthetic resin, preferably of lightweight material if possible. The cover 220 is preferably attached integrally to the receiving groove 216 of the sole 214. A plurality of threaded coupling holes 224 are penetrated at a proper position of the upper surface 222 of the cover 220, e.g., where elements of the roller device are not hindered, by coupling means such as a bolt (B) or screw in order to fix the roller device.

Alternatively, at the center of the upper surface 222 is provided a receiving groove 225 in which linkage of the roller device is received to move with ease. A fixing hole 226 is formed at the center of the receiving groove 225 such that the linkage is rotatably fixed thereto. A guide 227 is provided at the rear of the housing 220 such that manipulating unit is movably installed. The guide 227 has a circular arc shaped guide groove 228 to permit reciprocating movement of a lever of the manipulating unit. Also, a receiving groove 229 is formed at the rear of the upper surface 222 to permit smooth movement of the manipulating unit, and a guide groove 229a is preferably formed in the receiving groove 229 for precise movement of the lever. Roller device 230 is insertedly installed in the cover 220 inserted into the receiving groove 216 of the boot 210. The roller device 230 is provided with a housing 232 which is substantially inserted into and fixed to the cover 220. The housing 232 has a construction of a rectangular solid of which rear end and front end are opened. Rails 236, 238 are integrally formed at the upper outer edges of supporting surface 234 that is the upper surface of the housing 232 so that driving unit to be described later can be inserted onto, guided and driven. In the meanwhile, at the center of the supporting surface 234, a fixing groove 244 to which linkage is rotatably fixed is formed. Also, at the rear of the supporting surface 234, a fixing groove 246 to which a manipulating unit to be described later in detail is rotatably fixed is formed. Alternatively, at both sides of the housing 232, a plurality of installation holes 250 are formed to rotatably install links of wheel assembly to be described later in detail. At the supporting surface 234 of the housing 232, a penetration hole 234a is penetrated to communicate with the installation hole 224 of the cover 220. At the rear of the housing 232, a penetration hole 247 is preferably formed such that a bolt or screw for fixing lever to the manipulating unit to be described later each other is penetrated.

At the front of the housing 232, a front driving unit 252 is reciprocatably mounted. The front driving unit 252 includes an upper surface 254 having a partial cutout and supporting plates 256, 258 formed at and integrally bent from both sides of the upper surface 254, the supporting plate having guide grooves 257, 259 respectively inserted into the rear of the rails 236, 238 formed at both sides of the supporting surface 234 of the housing 232. At the rear end of the cutout of the upper surface of the front driving unit 252, a driving groove 260 is laterally formed so that a protruded piece of linkage to be described later is inserted and reciprocates. Also, at the front and rear of the supporting plates 256, 258, a plurality of installation grooves 262, 264 are formed such that wheel assembly reciprocates upwardly and downwardly and is rotatably fixable. In particular, at the lower portions of the installation grooves 262, 264, stopper grooves 262a, 264a are communicatingly formed at an approximately right angle such that link of wheel assembly is stably and fixedly maintained as. the shoe is converted to an inline skate.

At the rear of the housing 232, a rear driving unit 266 corresponding to the front driving unit 252 is reciprocatably mounted. The rear driving unit 266 includes an upper surface 268 having a partial cutout and supporting plates 270, 272 formed at and integrally bent from both sides of the upper surface 268, the supporting plates having guide grooves 271, 273 respectively inserted into the rear of the rails 236, 238 formed at both sides of the supporting surface 234 of the housing 232. At the front end of the upper surface of the rear driving unit 266, a driving groove 275 is laterally formed so that a protruded piece of linkage to be described later is inserted and reciprocates. Also, at the supporting plates 270, 272, a plurality of installation grooves 274, 276 are formed in the upward and downward directions such that wheel assembly reciprocates upwardly and downwardly and is rotatably fixable. In particular, at the lower portions of the installation grooves 274, 276, it is desirable that stopper grooves 274a, 276a are communicatingly formed at an approximately right angle such that link of wheel assembly is stably and fixedly maintained as the shoe is converted to an inline skate. Also, at the rear end of the upper surface 268, a longitudinal groove 278 is formed which manipulating unit to be described later is insertedly mounted in and operable, and which communicates with the fixing groove 246 formed at the rear of the housing 232. Also, at one side of the longitudinal groove 278, a lateral groove 280 is formed in a predetermined size.

At the housing 232, a linkage 282 is equipped to operate the respective driving units 252, 266. In more detail, the linkage 282 is provided with a body 286 which is rotatably fixed to a fixing groove 244 formed at the center of the supporting surface 234 of the housing 232 by a fixing piece 284. The body 286 is preferably made in a hinge type. Below one end of the body 286 of the linkage 282, a first protruded piece 288 which is rotatable within a driving groove 260 formed at the rear of the front driving unit 242 and is reciprocatably fixed within a predetermined range is installed. Below the other end of the body 286, a second protruded piece 290 which is reciprocatably inserted into a driving groove 275 formed at the front of the rear driving unit 266 is formed. To the fixing groove 246 formed at the rear of the housing 232, a manipulating unit 292 is rotatably fixed. The manipulating unit 292 includes a rotational shaft 294 rotatably fixed to the fixing groove 246 of the housing 232 and inserted into the longitudinal groove 278 of the rear driving unit 266, and an extension member 298 having an insertion piece 296 integrally formed at a right angle with the rotational shaft 294 and movably inserted into the lateral groove 280 of the rear driving unit 266. At the rear of the extension member 298, a fixing groove 299 for separatably fixing lever to be described later is formed. Alternatively, at an approximate center of the extension member 298, an insertion piece 298a inserted into the guide groove 229 of the cover 220 is protrudedly formed such that lever is stably and precisely reciprocatable in a circular arc direction. Also, the manipulating unit 292 is provided with a lever 300 integrally, which passes the guide groove 228 of the guide 227 of the cover 220 and is exposed to the rear of the shoe through the groove 218 of the sole 214 so that a skater or user can grasp, rotate in left and right sides and operate the manipulating unit 292. The lever 300 is constructed to penetrate the guide groove 228 of the cover 220 and the groove 218 of the sole 214 of the boot 210 when the roller device 230 is equipped in the boot and the cover 220 (See FIGs. 2a and 2b).

Alternatively, the lever 300 may be formed in a separation type for easy insertion and installation into the cover 220. In other words, the lever 300 is inserted into a fixing groove 299 of the extension member 298. Also, since the lever 300 has a penetration hole 300a formed at an end thereof and below the extension member 298 and communicating with a fixing hole (not shown), it can be fixed by a bolt (Bl). Alternatively, at an end of the lever 300, a grasp piece 300b for a user's easy and stable grasp and appearance may be provided.

Alternatively, an outer cover can be attached to the guide 227 of the cover 227 so as to maintain a clean appearance of the guide 227 and easily and precisely insert the lever 300. The outer cover 301 has a guide groove 301a communicating with the guide groove 228 of the guide 227, and penetration holes 301b formed at both ends of the guide groove 301a and having a sufficient size for easy entrance and exit of the lever 300.

In the meanwhile, a plurality of wheel assemblies are rotatably installed at the housing 232 and the respective driving units 252, 266. In more detail, a pair of front wheel assemblies 302 are installed at the front of the housing 232 and the front driving unit 252. Each of the pair of front wheel assemblies 302 is provided with a link 304 and a wheel 306 rotatably fixed to the link 304. At a proper position of each of the links, a penetration hole 310 is formed which is rotatably fixed to the installation hole 250 formed at the front of both sidewalls 248 of the housing 232 by a fin 308. At an upper portion of the link 304, fixing pieces 312 are releasably provided, which are reciprocatably inserted into the ring-shaped groove 249 formed at the front of both sidewalls 248 of the housing 232 and the corresponding installation grooves 262, 264 formed at the front driving unit 252. Of course, the respective wheels 306 are exchangeably and separatably fixed to ends of the links by a bolt. The wheel 306 can be formed of various materials or a general luminescent wheel.

Similarly, at the rear of the housing 232 and the rear driving unit 266, a pair of rear wheel assemblies 316 are installed which rotate in an opposite direction to the pair of front wheel assemblies 302. Each of the pair of rear wheel assemblies 316 is provided with a link 318 and a wheel 320 rotatably fixed to the link 316. At an upper portion of each of the links, penetration holes 324 are formed which are rotatably fixed to the installation holes 250 formed at the rear of both sidewalls 248 of the housing 232 by a fin 322. At an upper portion of the link 318, fixing pieces 326 are integrally formed, which are reciprocatably inserted up an down into the ring-shaped groove 249 formed at the rear of both sidewalls 248 of the housing 232 and the corresponding installation grooves 274, 276 formed at the rear driving unit 266. Of course, the respective wheels 320 are exchangeably and separatably fixed to ends of the links by a bolt 328. The wheel 320 can be formed of various materials or a general luminescent wheel.

While the present embodiment exemplarily shows that the shoe is provided with four wheel assemblies, they can be provided by a proper number depending on the size of the shoe. For instance, in size of 250 mm or more, or for an adult, four wheel assemblies of front two and rear two can be provided. Also, in a size smaller than 250 mm, or for children, three wheel assemblies of front two and rear one can be provided.

Alternatively, the shoe with the inline skate according to the present invention can be provided with a brake 340 for safety. In order to apply the brake 340, it is requested that a boss 334 be protrudedly formed at a proper position of the inside of the link of the rear wheel assembly of the pair of rear wheel assemblies 316 toward the inside. A lock groove 342 releasably fixed to the boss 334 is formed in the boss 340. Also, the brake 340 is generally provided with a pad 346 which contacts with the ground to perform the braking function.

Also, the shoe with the inline skate according to the present invention can be provided with a luminous unit 350 at the rear of the boot 210 for its appearance, advertisement and safety. The luminous unit 350 includes a body 352 fixed to the heel of the boot 210, a luminous body equipped in the body 352, a knob 356 for operating the luminous body 354, and a cap 358 fixed to the body 352, for operatably supporting the knob 356. Here, the body 352 can have various marks 360. It is desirable that the luminous body 354 is made by using a light emitting diode.

In the meanwhile, referring to FIGs. 9A and 9B, a shoe with an inline skate according to a second embodiment of the invention is provided with a boot 210 adapted to receive a foot of a user or a skater. The boot 210 includes a body 212 into which a foot of a user is received, and a sole 214 integrally formed below and with the body 212. The sole 214 has therein a receiving groove 216 into which roller device to be described later in detail is inserted. Also, at the rear of the sole 214, a groove 218 which permits the left and right movement of the lever of a manipulating unit to be described later is provided.

As shown in FIG. 10 to FIG. 12, a cover 20 is inserted in the sole 14 of the boot 10 for stable and smooth installation of roller device to be described later. The cover 20 is preferably formed of lightweight but strong metal. Alternatively, it is desirable that a frame 22 is formed at a predetermined height at inner corners of the cover 20 so as to provide a space enabling a smooth operation of linkage and manipulating unit of the roller device to be described later (FIG. 12). Also, it is desirable that a plurality of coupling holes 24 are formed at a proper position of the upper surface 22 of the cover 20, e.g., where elements of the roller device are not hindered, by coupling means such as a bolt (B) or screw in order to fix the roller device, and that welding nuts (N) are provided in the respective coupling holes 24. Of course, these coupling holes 24 may be formed at the sidewall of the cover 20.

Roller device 30 is insertedly installed in the cover 20 inserted into the receiving groove 15 of the boot 10. The roller device 30 is provided with a housing 32 which is substantially inserted into and fixed to the cover 20. The housing 32 has a construction of a rectangular solid of which rear end and front end are opened. Two pairs of guide grooves 36, 38, 40, 42 are provided at the front and rear upper of supporting surface 34 that is the upper surface of the housing 32 so that driving unit to be described later can be guided and driven. The respective pairs of guide grooves 36, 38, 40, 42 are formed symmetric. Also, the pair of guide grooves 36, 40 are formed longer than the pair of guide grooves 38, 42 to correspond to the shape of the driving unit to be described later. Meanwhile, at the center of the supporting surface 34, a fixing groove 44 to which linkage is rotatably fixed is formed. Also, at the front of the upper surface 34, a fixing groove 46 to which a manipulating unit to be described later in detail is rotatably fixed is formed. Alternatively, at both sides of the housing 32, a plurality of installation holes 50 are formed to rotatably install links of wheel assembly to be described later in detail. Alternatively, at the supporting surface 34 of the housing 32, a penetration hole 34a is penetrated to communicate with the installation hole 24 of the cover 20.

At the front of the housing 32, a front driving unit 52 is reciprocatably mounted. The front driving unit 52 includes an upper surface 54 having a partial cutout and supporting plates 56, 58 formed at and integrally bent from both sides of the upper surface 54, and inserted into guide grooves 36, 38 formed at the supporting surface 34 of the housing 32. At the rear end of the cutout of the upper surface of the front driving unit 52, a driving groove 60 is laterally formed so that a protruded piece of linkage to be described later is inserted and reciprocates. Also, at the front and rear of the supporting plates 56, 58, a plurality of installation grooves 62, 64 are formed in upward and downward directions such that wheel assembly reciprocates upwardly and downwardly and is rotatably fixable. In particular, at the lower portions of the installation grooves 62, 64, stopper grooves 62a, 64a are communicatingly formed at an approximately right angle such that link of wheel assembly is stably and fixedly maintained as the shoe is converted to an inline skate. At the rear of the housing 32, a rear driving unit 66 corresponding to the front driving unit 52 is reciprocatably mounted. The rear driving unit 66 includes an upper surface 68 having a partial cutout and supporting plates 70, 72 formed at and integrally bent from both sides of the upper surface 68, the supporting plates 70, 72 being respectively inserted into guide grooves 40, 42 formed at the rear of the supporting surface 34 of the housing 32. At the front end of the upper surface of the rear driving unit 66, a driving groove 75 is laterally formed so that a protruded piece of linkage to be described later is inserted and reciprocates. Also, at the supporting plates 70, 72, a plurality of installation grooves 74, 76 are formed in the upward and downward directions such that wheel assembly reciprocates upwardly and downwardly and is rotatably fixable. In particular, at the lower portions of the installation grooves 74, 76 formed on the supporting plates 70, 72, it is desirable that stopper grooves 74a, 76a are communicatingly formed at an approximately right angle such that link of wheel assembly is stably and fixedly maintained as the shoe is converted to an inline skate. Also, at the rear end of the upper surface 68, a longitudinal groove 78 is formed which manipulating unit to be described later is insertedly mounted in and operable, and which communicates with the fixing groove 46 formed at the rear of the housing 32. Also, at one side of the longitudinal groove 78, a lateral groove 80 is formed in a predetermined size.

At the housing 32, a linkage 82 is equipped to operate the respective driving units 52, 66. The linkage 82 is provided with a body 86 which is rotatably fixed to a fixing groove 44 formed at the center of the supporting surface 34 of the housing 32 by a fixing piece 84. The body 86 is preferably made in a circular plate type. At a lower portion of the body 86 of the linkage 82, a first protruded piece 88 which is reciprocatably fixed to the driving groove 60 formed at the rear of the front driving unit 42. At a corresponding position to the first protruded piece 88, a second protruded piece 90 which is reciprocatably inserted into a driving groove 75 formed at the front of the rear driving unit 66 is formed.

To the fixing groove 46 formed at the rear of the housing 32, a manipulating unit 92 is rotatably fixed. The manipulating unit 92 includes a rotational shaft 94 rotatably fixed to the fixing groove 46 of the housing 32 and inserted into the longitudinal groove 78 of the rear driving unit 66, and an extension member 94 having an insertion piece 92 integrally formed at a right angle with the rotational shaft 94 and movably inserted into the lateral groove 80 of the rear driving unit 66. Also, the manipulating unit 92 is provided with a lever 100 integrally, which is exposed to the rear of the shoe through the groove 18 of the sole 14 so that a skater or user can grasp, rotate in left and right sides and operate the driving unit. The lever 100 is constructed to penetrate the penetration hole of the cover 20 and the groove 18 of the sole 14 of the boot 10 when the roller device 30 is equipped in the boot 10 and the cover 20. Alternatively, the lever 100 may be formed in a separation type for easy insertion and installation into the cover 20. In other words, the lever 100 can be constructed to have a fixing portion 100a and a grasp piece 100b releasably fixed to the fixing portion 100a and coupled to the fixing portion 110a through the groove 18 of the sole 14. The grasp piece 100b and the fixing portion 100a can be coupled in a bolt-nut coupling way. In the meanwhile, a plurality of wheel assemblies are rotatably installed at the housing 32 and the respective driving units 52, 66. In more detail, a pair of front wheel assemblies 102 are installed at the front of the housing 32 and the front driving unit 52. Each of the pair of front wheel assemblies 102 is provided with a curved link 104 and a wheel 106 rotatably fixed to the link 104. At a proper position of each of the links 104, e.g., at a curved portion, a penetration hole 110 is formed which is rotatably fixed to the installation hole 50 formed at the front of both sidewalls 48 of the housing 32 by a fin 108. At an upper portion of the link 104, fixing pieces 112 are integrally protrudedly formed, which are reciprocatably upwardly and downwardly inserted into the corresponding installation grooves 62, 64 formed at the front driving unit 52. Of course, the respective wheels 106 are exchangeably and separatably fixed to ends of the links by a bolt 114. The wheel 106 can be formed of various materials or a general luminescent wheel. Similarly, at the rear of the housing 32 and the rear driving unit 66, a pair of rear wheel assemblies 116 are installed which rotate in an opposite direction to the pair of front wheel assemblies 102. Each of the pair of rear wheel assemblies 116 is provided with a curved link 118 and a wheel 120 rotatably fixed to the link 116. At proper positions of the respective links 118, e.g., at curved portions, penetration holes 124 are penetratedly formed which are rotatably fixed to the installation holes 50 formed at the rear of both sidewalls 48 of the housing 32 by a fin 122. At an upper portion of the links 118, fixing pieces 126 are integrally formed, which are reciprocatably inserted up an down into the corresponding installation grooves 74, 76 formed at the rear driving unit 66. Of course, the respective wheels 20 are exchangeably and separatably fixed to ends of the links by a bolt 128. The wheel 120 can be formed of various materials or a general luminescent wheel.

As shown in FIG. 13, a modified example of the roller device according to the second embodiment of the present invention is constructed to fix and maintain the wheel assembly more stably when the shoe is used as the inline skate.

In other words, at the inside of the supporting plates 56, 58 of the front driving unit 52, stoppers 56a, 58a are integrally protrudedly formed which are in contact with the link 104 of the wheel assembly of the pair of front wheel assemblies 102 and fixedly supported when the shoe is used as the inline skate. Also, at the inside of the supporting plates 70, 72 of the rear driving unit 66, stoppers 70a, 72a are integrally protrudedly formed which are in contact with the link 118 of the wheel assembly of the pair of rear wheel assemblies 116 and fixedly supported when the shoe is used as the inline skate.

Correspondingly to the above construction, at an upper side of the link 104 of each of the pair of front wheel assemblies 102, a flat lock surface 104a is formed which is in contact with the stoppers 70a, 72a of the rear driving unit 66 to prevent an arbitrary deviation of the wheel assembly.

Meanwhile, as aforementioned, in case separate stoppers are provided in the respective driving units, it is preferable that auxiliary groove 56a, 58a, 70a, 72a enabling entrance and exit of the stoppers 56a, 58a, 70a, 72a during the assembly of the driving units 52, 66 are formed at the respective guide grooves 36, 38, 40, 42 for easy assembly between the housing 32 and the respective driving units 52, 55. Alternatively, in the roller device of the aforementioned modified example, the stopper grooves integrally formed at the lower portion of the installation grooves can be omitted.

Next, there will be described in detail using ways and operation modes of the shoe with the inline skate according to the first embodiment of the present invention with reference to FIGs. 2a to 8.

First, referring to FIGs. 2a and 2b, assembly procedure of the roller device 230 with the boot 210 will be described in brief. For instance, while the sole is manufactured in a manufacturing factory of the shoe or sole, cover 220 is inserted into receiving groove 216 formed on the sole 214 and attached or heat-attached to couple the cover 200 to the sole 214 as one body. Of course, the sole 214 is then contacted with the underside of the body 212 to form a basic shoe structure. In this status, the completely assembled roller device 230 is insertedly installed in the cover 220 and then the bolt (B) is inserted in the coupling holes 224 of the cover 220 through the penetration hole 234a of the housing 232 to equip the roller device 230 in the boot. As a result, a basic inline skate is made. After that, a manufacturer inserts the lever 300 into the fixing groove 299 of the extension member 298 of the manipulating unit 292 through the penetration groove 301b of the outer cover 301 and then couples the bolt (Bl) to the lower portion of the insertion piece 296 through the penetration hole 247 of the housing 232 and the penetration hole 300a of the lever 300 to thereby complete the installation of the lever 300 of the manipulating unit 292. Of course, at an end of the lever 300, the grasp piece 300b can be inserted for easy grasp. Also, if necessary, the luminous unit 350 can be installed at the rear of the boot 210 so as to enhance the visibility. In this status, as shown in FIGs. 2a, 4a and 6, when a user intends to use the shoe as an ordinary shoe, the sole 214 of the body 210 maintains contact status with the ground. In this status, the front driving unit 252 and the rear driving unit 266 are spaced apart by a maximal distance from each other, so that all the wheel assemblies of the pairs of driving wheel assemblies are maintained at a completely folded status within the housing 232. Accordingly, the user can use the shoe with inline skate as an ordinary sports shoe.

Meanwhile, in such a state that the shoe with inline skate is used as an ordinary shoe, when the user intends to enjoy the inline skating or roller blading, it is requested that the respective wheel assemblies of the pairs of wheel assemblies 302, 316 be rotated to protrude the wheels 306, 316 outside the housing 232. In more detail, as converted from FIG. 6 to FIG 8, if the user grasps the grasp piece 300b of the lever 300 of the manipulating unit 292 which is exposed to the outside through the groove 218 (FIG. 2a) of the rear of the sole 214 and rotates it as indicated by the arrow (Al), the rear driving unit 266 connected to the manipulating unit 292 moves forward as indicated by the arrow (A2).

Thus, while the rear driving unit 266 moves forward, the body 286 of the linkage 282 installed in the driving groove 274 of the front of the rear driving unit 266 by the second protruded piece 290 rotates in the arrow (A3) direction, so that the front driving unit 252 in which the first protruded piece 288 of the linkage 282 is installed in the driving groove 260 of the rear moves backward by the first protruded piece 288 of the linkage 282 as indicated by the arrow (A4). Thus, the movement of the driving units 252, 266 is smoothly performed along the rails 236, 238 formed at outer corners of the housing 232 corresponding to the guide grooves 257, 259, 271, 273 formed at inner corners of the driving units 252, 266.

Also, according to the relative movement of the front driving unit 252 and the rear driving unit 266 by the linkage 282, the respective wheel assemblies of the pair of wheel assemblies 302, 316 moving in combination with the respective driving units 252, 266 rotate in the arrow directions (A5, A6) and are expanded. In other words, as the manipulating unit 292 continues to rotate in the arrow direction (Al), the respective driving units 252, 266 continue to move in relative direction by the linkage 282. The respective links 304, 318 of the wheel assemblies of the corresponding pair of wheel assemblies 302, 316 installed in the installation grooves 262, 264, 274, 276 of the respective driving units 252, 266 by the fixing pieces 312, 326 rotate in the arrow directions (A5, A6) with an axis of the fins 308, 322 fixed in the installation hole 250.

At this time, the fixing pieces 312, 326 integrally formed at the upper portion of the respective links 304, 318 gradually move in the downward direction along the installation grooves 262, 264, 274, 276 formed on the respective driving units 252, 266. The fixing pieces 312, 326 moves in the downward direction until the wheels 306, 320 of the respective wheel assemblies are completely exposed as shown in FIG. 7. Of course, the rotation of the links 304, 318 of the respective wheel assemblies is performed by the fixing pieces 312, 326 of the respective links 304, 318 having the fixing fins 308, 322 inserted into the respective penetration holes 310, 324 (FIG. 3) and fixed in the installation hole 250 of the housing 232 as a fixing axis being inserted into the corresponding ring-shaped groove 249 to perform a circle movement.

The pair of wheel assemblies 302, 316 move forward and backward until the lever 300 of the manipulating unit 292 completely rotates in the arrow direction (Al) as shown in FIGs. 2b, 4b and 8 and thus the fixing pieces 312, 326 provided in the links 304, 318 of the wheel assemblies are inserted into the stopper grooves 262a, 264a, 274a, 276a communicating with the lower side of the installation grooves 262, 264, 274, 276 formed on the sidewalls 256, 258, 270, 272 of the driving units 252, 266 and fixed to. This corresponds to a status that the lever 300 of the manipulating unit 292 completely rotates in the arrow direction (Al), the respective driving units 252, 266 move in the arrow directions (A2, A4) to face to each other to the maximum extent, the linkage 282 rotates in the arrow direction (A3) to the maximum extent, and the wheel assemblies of the pair of wheel assemblies 302, 316 move in the arrow directions (A5, A6) to the maximum extent.

Thus, if the fixing pieces 312, 326 provided in the links 304, 318 of the respective wheel assemblies 304, 318 are inserted into the stopper grooves 262a, 264a, 274a, 276a of the respective driving units 252, 266, the wheel assemblies of the pair of wheel assemblies are completely expanded as shown in FIGs. 2b, 4b and 8, and thus the respective wheels 306, 320 are completely exposed in the downward direction of the sole 214 and fixed to be shaped in inline skate. As a result, it becomes possible that the user enjoys the inline skating or roller blading. At this time, the user can separate and preserve the grasp piece 300b of the lever 300.

In addition, the user can install the brake 340 for safety. In other words, if the user inserts the brake 340 shown in FIG. 3 into the rear of the housing 232, rotates and exposes the pair of wheel assemblies 302, 316 as aforementioned, the boss 334 protrudedly formed at the inside of the link 318 of the rear wheel assembly of the pair of rear wheel assemblies is inserted into the lock groove 342 and locked, so that the brake 340 can be installed in the shoe.

Also, the user pushes the knob 356 of the luminous unit 350 provided at the rear of the boot 210 shown in FIG. 3 and operates the luminous body 354 to thereby enhance the visibility and stability.

On the contrary, if the user intends to use the shoe as a general shoe, e.g., normal state, after the inline skating, the user grasps the grasp portion of the lever 300 of the manipulating unit 292 and rotates it in the arrow direction (All) as converted from FIG. 8 to FIG. 6, the rear driving unit 266 connected to the manipulating unit 292 moves backward as indicated by the arrow (A 12).

Thus, while the rear driving unit 266 moves backward, the body 286 of the linkage 282 installed in the driving groove 274 of the front of the rear driving unit 266 by the second protruded piece 290 rotates in the arrow (A13) direction, so that the front driving unit 252 in which the first protruded piece 288 of the linkage 282 is installed in the driving groove 260 of the rear moves forward as indicated by the arrow (A14). While the respective driving units 252, 266 move in opposite directions, the fixing pieces 312, 326 of the links 304, 318 of the respective wheel assemblies deviate from the stopper grooves 262a, 264a, 274a, 276a formed on the sidewalls 256, 258, 270, 272 of the respective driving units 252, 266 and start to move upwardly along the respective installation grooves 262, 264, 274, 276.

Also, according to the relative movement of the front driving unit 252 and the rear driving unit 266 by the linkage 282, the respective wheel assemblies of the pair of wheel assemblies 302, 316 installed in the respective driving units 252, 266 rotate in the arrow directions (A15, A 16) and moves to the original position, e.g., toward the inside of the housing 232. In other words, as the manipulating unit 292 continues to rotate in the arrow direction (All), the respective driving units 252, 266 continue to move in opposite direction by the linkage 282. The respective links 304, 318 of the wheel assemblies of the corresponding pair of wheel assemblies 302, 316 installed by the fixing pieces 312, 326 inserted into the installation grooves 262, 264, 274, 276 of the respective driving units 252, 266 rotate in the arrow directions (A15, A16) with an axis of the fins 308, 322 fixed in the installation hole 250 formed on both sidewalls 248 of the housing 232 shown in FIG 3, and is then folded.

At this time, the fixing pieces 312, 326 integrally formed at the upper portion of the respective links 304, 318 move along the ring-shaped grooves 249 formed on both sidewalls 248 of the housing 232 shown in FIGs. 3 and 5b, and gradually move in the upward direction along the installation grooves 262, 264, 274, 276 formed on the front and rear driving units 252, 266. The fixing pieces 312, 326 move in the downward direction until the wheels 306, 320 of the respective wheel assemblies completely retire as shown in FIG. 6. Of course, the rotation of the links 304, 318 of the respective wheel assemblies is performed by a ring-shaped motion of the fixing pieces 312, 326 of the respective links 304, 318 having the fixing fins 308, 322 inserted into the respective penetration holes 310, 324 (FIG. 3) and fixed in the installation hole 250 of the housing 232 as a rotational axis. The rotation of the pair of wheel assemblies 302, 316 continues until the lever

300 of the manipulating unit 292 completely rotates in the arrow direction (All) and thus the fixing pieces 312, 326 provided in the links 304, 318 of the wheel assemblies deviate from the stopper grooves 262a, 264a, 274a, 276a respectively formed on both sidewalls 256, 258, 270, 272 of the driving units 252, 266 and completely retire to the inside of the housing 232. This is an initial normal status, e.g., a status serving as a sports shoe or shoe, and corresponds to a status that the lever 300 of the manipulating unit 292 rotates in the arrow direction (All) to the maximum extent, the respective driving units 252, 266 move in the opposite arrow directions (A12, A14) to the maximum extent, the linkage 282 rotates in the arrow direction (A13) to the maximum extent, the wheel assemblies of the pair of wheel assemblies 302, 316 move in the arrow directions (A15, A 16) to the maximum extent, and the fixing pieces 312, 326 of the respective wheel assemblies return to a status in which the fixing pieces 312, 326 is positioned at the uppermost place of the installation grooves 262, 264, 274, 276 of the respective driving units 252, 266. In this status, the user removes the brake 340 and then can walk conveniently and stably.

Hereinafter, there will be described in detail using ways and operation modes of the shoe with the inline skate according to the second embodiment of the present invention with reference to FIGs. 9a and 9b and FIGs. 14 to 17.

First, the assembly procedure of the roller device 30 with the boot 10 will be described in brief. The cover 20 is inserted into receiving groove 16 formed on the sole 14 of the boot 10 and heat-attached to couple the cover 20 to the sole 14 as one body. In this status, the completely assembled roller device 30 is insertedly installed in the cover 20 and then a coupling means such as the bolt (B) is inserted into the coupling hole 24 of the cover 20 and coupled with the welding nut (N) to complete the coupling of the roller device 30 with the boot. After that, a manufacturer couples the grasp piece 100b of the lever 100 of the manipulating unit 92, or can provide it to a user. In this status, when a user intends to use the shoe as an ordinary shoe, as shown in FIG. 9a, the sole 14 of the boot 10 maintains contact status with the ground. In this status, the front driving unit 52 and the rear driving unit 66 are spaced apart by a maximal distance from each other in opposite directions, so that all the wheel assemblies of the pairs of driving wheel assemblies 102, 116 are maintained at a completely folded status within the housing 32. Accordingly, the user can use the shoe with inline skate as an ordinary sports shoe or a general shoe.

Meanwhile, in such a state that the shoe with inline skate is used as an ordinary shoe, when the user intends to enjoy the inline skating or roller blading, it is requested that the respective wheel assemblies of the pairs of wheel assemblies 102, 116 be rotated to protrude the wheels 306, 316 outside the receiving groove 16 of the sole 14, e.g., outside the housing 32. In more detail, if the user grasps the grasp piece 100b of the lever 100 of the manipulating unit 92 which is exposed to the outside through the groove 18 of the rear of the sole 14 and rotates it as indicated by the arrow (Al), the rear driving unit 66 connected to the manipulating unit 92 moves forward as indicated by the arrow (A2).

Thus, while the rear driving unit 66 moves forward, the body 86 of the linkage 82 installed by the second protruded piece 90 in the driving groove 74 of the front of the rear driving unit 66 rotates in the arrow (A3) direction, so that the front driving unit 52 in which the first protruded piece 88 of the linkage 82 is installed in the driving groove 60 of the rear moves backward as indicated by the arrow (A4). Thus, the movement of the driving units 52, 66 is smoothly performed by the supporting plates 56, 58, 70, 72 being inserted into the corresponding guide grooves 36, 38, 40, 42 formed on the supporting surface 34 of the housing 32.

Also, according to the relative movement of the front driving unit 52 and the rear driving unit 66 by the linkage 82, the respective wheel assemblies of the pair of wheel assemblies 102, 116 rotate in the arrow directions (A5, A6) and are expanded (See FIGs. 15 and 16). In other words, as the manipulating unit 92 continues to rotate in the arrow direction (Al), the respective driving units 52, 66 continue to move in relative direction by the linkage 82. The respective links 104, 118 of the wheel assemblies of the corresponding pair of wheel assemblies 102, 116 installed in the installation grooves 62, 64, 74, 76 of the respective driving units 52, 66 by the fixing pieces 112, 126 rotate in the arrow directions (A5, A6) with an axis of the fins 108, 122.

At this time, the fixing pieces 112, 126 integrally formed at the upper portion of the respective links 104, 118 gradually move in the downward direction along the installation grooves 62, 64, 74, 76 formed on the respective driving units 52, 66. The fixing pieces 112, 126 moves in the downward direction until the respective wheel assemblies are completely expanded as shown in FIG. 17. Of course, the rotation of the links 104, 118 of the respective wheel assemblies is performed by the circle motion of the fixing pieces 112, 126 inserted into the respective penetration holes 110, 124 and fixed in the installation hole 50 of the housing 32 as a fixing axis.

The rotation of the pair of wheel assemblies 102, 116 continues until the lever 100 of the manipulating unit 92 completely rotates in the arrow direction (Al), the fixing pieces 112, 126 provided in the links 104, 118 of the wheel assemblies, as shown in FIG. 17, are inserted into the stopper grooves 62a, 64a, 74a, 76a communicating with the lower side of the installation grooves 62, 64, 74, 76 formed on the sidewalls 56, 58, 70, 72 of the driving units 52, 66 and fixed to, and is then stopped. This corresponds to a status that the lever 100 of the manipulating unit 92 completely rotates in the arrow direction (Al), the respective driving units 52, 66 move in the arrow directions (A2, A4) to face to each other to the maximum extent, the linkage 82 rotates in the arrow direction (A3) to the maximum extent, and the wheel assemblies of the pair of wheel assemblies 102, 116 rotate in the arrow directions (A5, A6) to the maximum extent.

Thus, if the fixing pieces 112, 126 provided in the links 104, 118 of the respective wheel assemblies 104, 118 are inserted into the stopper grooves 62a, 64a, 74a, 76a of the respective driving units 52, 66, the wheel assemblies of the pair of wheel assemblies are completely expanded as shown in FIG. 9b, and thus the respective wheels 106, 120 are completely exposed in the downward direction of the sole 14 and fixed to be shaped in an inline skate. As a result, it becomes possible that the user enjoys the inline skating or roller blading. At this time, the user can separate and preserve the grasp piece 100b of the lever 100, to thereby prevent damage of the grasp piece 100b.

In the meanwhile, in case a roller device according to another embodiment of the present invention is applied as shown in FIG. 18, if the wheel assemblies are expanded by the aforementioned similar operation, the lock face 104a formed on the upper side of the links 104 of the pair of front wheel assemblies maintains a contact with the stoppers 56a, 58a of the front driving unit 52. Also, the lock face 118a formed on the upper side of the links 118 of the pair of rear wheel assemblies maintains a contact with the stoppers 70a, 72a of the rear driving unit 66. Accordingly, by the interlocking force between the lock surfaces 104a, 118a of the links 104, 118 and the stoppers 56a, 58a, 70a, 72a of the driving units 52, 66 as well as the binding force between the fixing pieces 112, 126 of the links 104, 118 and the stopper grooves 62a, 64a, 74a, 76a of the driving units 52, 66, the coupling between them becomes firm, so that it is prevented to arbitrarily fold or retire the respective wheel assemblies and thus it becomes to enjoy a stable inline skating.

On the contrary, if the user intends to use the shoe in a normal state, e.g., as a general shoe after the inline skating, the user grasps the grasp portion of the lever 100 of the manipulating unit 92 and rotates it in the arrow direction (All) as converted from FIG. 17 to FIG. 14, the rear driving unit 66 connected to the manipulating unit 92 moves backward as indicated by the arrow (A12).

Thus, while the rear driving unit 66 moves backward, the body 86 of the linkage 82 installed in the driving groove 74 of the front of the rear driving unit 66 by the second protruded piece 90 moves forward in the arrow (A 13) direction, so that the front driving unit 52 in which the first protruded piece 88 of the linkage 82 is installed in the driving groove 60 of the rear moves forward as indicated by the arrow (A14). While the respective driving units 52, 66 move in opposite directions respectively, the fixing pieces 112, 126 of the links 104, 118 of the respective wheel assemblies deviate from the stopper grooves 62a, 64a, 74a, 76a formed on the sidewalls 56, 58, 70, 72 of the respective driving units 52, 66 and start to move upwardly along the respective installation grooves 62, 64, 74, 76.

Also, according to the relative movement of the front driving unit 52 and the rear driving unit 66 by the linkage 82, the respective wheel assemblies of the pair of wheel assemblies 102, 116 installed in the respective driving units 52, 66 rotate in the arrow directions (A15, A16) and moves to the original position, e.g., toward the inside of the housing 32. In other words, as the manipulating unit 92 continues to rotate in the arrow direction (All), the respective links 104, 118 of the wheel assemblies of the corresponding pair of wheel assemblies 102, 116 installed in the installation grooves 62, 64, 74, 76 of the respective driving units 52, 66 by the fixing pieces 112, 126 rotate in the arrow directions (Al 5, A16) with an axis of the fins 308, 322 and is then folded.

At this time, the fixing pieces 112, 126 integrally formed at the upper portion of the respective links 104, 118 gradually move in the upward direction along the installation grooves 62, 64, 74, 76 formed on the front and rear driving units 52, 66. As shown in FIG. 14, the fixing pieces 112, 126 move in the upward direction until the wheels 306, 320 of the respective wheel assemblies completely retire. Of course, the rotation of the links 104, 118 of the respective wheel assemblies is performed by the circle movement of the fixing pieces 112, 126 having the fins 108, 122 inserted into the respective penetration holes 110, 124 and fixed in the installation hole 50 formed on both sidewalls 56, 58, 70, 72 of the housing 32 as a rotational axis.

The rotation of the pair of wheel assemblies 102, 116 continues until the lever 100 of the manipulating unit 92 completely rotates in the arrow direction (All) and thus the fixing pieces 112, 126 provided in the links 104, 118 of the wheel assemblies deviate from the stopper grooves 62a, 64a, 74a, 76a respectively formed on both sidewalls 56, 58, 70, 72 of the driving units 52, 66 and completely retire to the inside of the housing 32. Of course, this is an initial normal status, e.g., a status serving as a sports shoe or a general shoe, and corresponds to a status that the lever 100 of the manipulating unit 92 rotates in the arrow direction (All) to the maximum extent, the respective driving units 52, 66 move in the opposite arrow directions (A12, A14) to the maximum extent, the linkage 82 rotates in the arrow direction (A 13) to the maximum extent, the respective wheel assemblies of the pair of wheel assemblies 102, 116 rotate in the arrow directions (A15, A16) to the maximum extent, and the fixing pieces 112, 126 of the respective wheel assemblies return to a status in which the fixing pieces 112, 126 is positioned at the uppermost place of the installation grooves 62, 64, 74, 76 of the respective driving units 52, 66. In this status, the user can walk conveniently and stably with wearing the shoe with inline skate.

Thus, the user can protrude the wheels or restore the wheels to the original position by operating the roller device whenever necessary, so that it becomes possible that the user utilizes the shoe for inline skating or roller blading or as an ordinary shoe.

As described previously, the shoe with the inline skate of the present invention can be used as an ordinary shoe while it can be used for in-line skating or roller blading as needed, so that convenience is enhanced. Also, when the shoe is used as the inline skate, the respective wheel assemblies are firmly locked in an expansion status and maintained at such a status, so that safety is also enhanced.

In addition, since it is possible to rapidly and stably protrude the wheels of the wheel assemblies or restore them, the conversion between the shoe function and the inline skate function can be carried out rapidly and easily, so that productivity is further enhanced.

Further, since disassembly, assembly, exchange and repair are easy and rapid, workability is also enhanced.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A shoe with an inline skate, the shoe being used as an ordinary shoe in walking and used as the inline skate in roller blading, the shoe comprising: a boot including a body adapted to receive a foot of a user and a sole integrally attached to the underside of the body and having a receiving groove in a longitudinal direction; a cover insertedly installed in the receiving groove; and a roller device including a housing detachably equipped in the cover, a front driving unit movably insertedly installed in front of the housing, a rear driving unit movably insertedly installed in rear of the housing, an linkage fixed to the housing, for moving the front driving unit in combination with the rear driving unit in an opposite direction to each other, front wheel assembly and rear wheel assembly respectively equipped in the front driving unit and the rear driving unit rotatably in an opposite direction, and a manipulating unit for operating the rear driving unit.

2. The shoe of claim 1, wherein the cover comprises an upper surface having a receiving groove which enables a rotational motion of the linkage, and a coupling hole for detachably equipping the housing.

3. The shoe of claim 1, wherein the cover comprises at rear thereof a receiving groove which enables a rotational motion of the manipulating unit, a guide having a guide groove into which a part of the manipulating unit is rotatably inserted.

4. The shoe of claim 1, wherein the housing comprises a rail integrally formed at an outer corner thereof, and each of the front driving unit and the rear driving unit comprises a guide groove formed at an inner corner thereof and reciprocatably inserted into the rail of the housing.

5. The shoe of claim 1, wherein the housing comprises a supporting surface having a fixing groove to which the linkage for moving the front driving unit in combination with the rear driving unit is rotatably fixed, and both sides integrally formed with the supporting surface and having a plurality of installation holes to which the respective wheel assemblies are rotatably fixed and a plurality of ring-shaped grooves for guiding the rotational motion of the respective wheel assemblies.

6. The shoe of claim 5, wherein the front driving unit comprises an upper surface having a driving groove laterally formed at the rear thereof, and supporting plates integrally formed at both sides of the upper surface and in which a plurality of installation grooves are formed such that the respective wheel assemblies of the front wheel assembly of the wheel assemblies are reciprocatably and rotatably fixable, and the rear driving unit comprises an upper surface having a driving groove laterally formed at the front thereof, and supporting plates integrally formed at both sides of the upper surface and in which a plurality of installation grooves are formed such that the respective wheel assemblies of the rear wheel assembly of the wheel assemblies are reciprocatably and rotatably fixable.

7. The shoe of claim 6, further comprising a stopper groove formed at a lower portion of each of the installation grooves, for fixing the wheel assembly at an expansion status when the shoe is converted into the inline skate holes.

8. The shoe of claim 6, further comprising a manipulating unit formed at the rear of the upper surface of the rear driving unit, the manipulating unit communicating with a fixing groove formed at the front of the housing and being fixed to the fixing groove.

9. The shoe of claim 1, wherein the linkage comprises protruded pieces integrally formed at both ends thereof and reciprocatably fixed for rotation within the respective driving units, and a body formed at the center thereof and rotatably fixed to a fixing groove formed on the upper surface of the housing, the body being formed in a hinge type.

10. The shoe of claim 1, wherein the manipulating unit comprises a rotational shaft rotatably fixed to a fixing groove of the housing and inserted into a longitudinal groove of the rear driving unit, and an extension member integrally formed with the rotational shaft at a rear of the manipulating unit and having an insertion piece movably inserted into a lateral groove of the rear driving unit.

11. The shoe of claim 1, wherein the extension member comprises a fixing groove formed at the rear thereof, and a lever provided at an end thereof with a grasp piece grasped and operated by a user is separatably inserted and fixed.

12. The shoe of claim 1, wherein each of the wheel assemblies of the pair of wheel assemblies comprises a link rotatable fixed to the housing, and a wheel rotatably fixed to the link.

13. The shoe of claim 12, wherein the link has a penetration hole penetrated to be rotatably fixed to each of installation holes formed on both sidewalls of the housing, and fixing pieces which are reciprocatably inserted into each of ring-shaped grooves formed on both sidewalls of the housing are fixed to an upper portion of the link.

14. The shoe of claim 1, wherein the front wheel assembly comprises two pairs of wheel assemblies, and the rear wheel assembly comprises two pairs of wheel assemblies.

15. The shoe of claim 1, wherein the front wheel assembly comprises two pairs of wheel assemblies, and the rear wheel assembly comprises a pair of wheel assemblies.

16. The shoe of claim 1, wherein the rear wheel assembly comprises a boss integrally formed with the link and inwardly protruded, and a brake releasably equipped in the boss.

17. The shoe of claim 16, wherein the brake comprises a lock groove releasably fixed to the boss formed in the link of the wheel assembly, and a pad exchangeably provided in the body and contacting with the ground.

18. The shoe of claim 1, further comprising a luminous unit attached to the rear of the boot.

19. The shoe of claim 18, wherein the luminous unit comprises a body fixed to the heel of the boot, a luminous body equipped in the body, a knob for operating the luminous body, and a cap fixed to the body, for operatably supporting the knob.

20. The shoe of claim 19, wherein the luminous body is a light emitting diode (LED) and the body is provided with a plurality of marks.

21. The shoe of claim 1 , wherein the housing has a construction of a rectangular solid of which front, rear and lower sides are opened, and comprises a supporting surface having a pair of guide grooves facing with each other such that the front driving unit and the rear driving unit are insertedly installed and guided, a first fixing hole formed at the center thereof and to which the linkage is rotatably fixed, and a second fixing hole formed at the rear thereof and to which the manipulating unit is rotatably fixed, and side surfaces integrally formed at both sides of the supporting plate and having a plurality of installation holes to which each of the wheel assemblies of the pair of wheel assemblies is rotatably fixed.

22. The shoe of claim 21, wherein the front driving unit a front driving unit comprises: an upper surface having a partial cutout portion and a driving groove laterally formed such that the linkage is rotatably installed at the rear thereof; and supporting plates bent from and integrally formed at both sides of the upper surface, and having a plurality of rectangular installation grooves inserted into the guide grooves formed on the supporting surface of the housing and into which the respective wheel assemblies are rotatably and insertedly installed, and the rear driving unit comprises: an upper surface having a partial cutout portion, a driving groove formed at the front thereof and a longitudinal groove and a lateral groove both formed at the rear thereof, and a plurality of rectangular installation grooves bent from and integrally formed at both sides of the upper surface and respectively inserted into the guide grooves formed on the supporting surface of the housing and into which the respective wheel assemblies are rotatably and insertedly installed, the longitudinal groove communicating with a fixing hole formed in the rear of the housing such that the manipulating unit is penetratably installed, the manipulating unit being inserted into the later groove so as to be interlocked by the manipulating unit.

23. The shoe of claim 22, wherein the linkage comprises a circular plate type body rotatably fixed to a fixing groove formed on the supporting surface of the housing by a supporting piece, a first protruded piece formed at one side of lower surface of the body and reciprocatably fixed to the driving groove formed at the rear of the front driving unit, and a second protruded piece protruded formed at a position corresponding to a position where the first protruded piece is installed, and reciprocatably inserted into the driving groove formed at the front of the rear driving unit, the circular plate type body, the first protruded piece and the second protruded piece being integrally formed.

24. The shoe of claim 22, wherein the manipulating unit comprises: a rotational shaft rotatably fixed to the fixing groove of the housing and penetratably inserted into the longitudinal groove of the rear driving unit; an extension member integrally formed with the rotational shaft and having an insertion piece 296 integrally formed at an end thereof and reciprocatably inserted into the lateral groove of the rear driving unit; and a lever grasped by a hand of a user and rotatable in right and left directions, the rotational shaft, the extension member and the lever being integrally formed in the manipulating unit.

25. The shoe of claim 22, wherein the respective wheel assemblies of the pair of wheel assemblies have a link and a wheel 106 rotatably and releasably fixed to the link, the link being curved, having a penetration hole rotatably fixed to the installation hole formed at sidewall of the housing, and a fixing piece formed at the upper portion thereof and inserted to be reciprocatable up an down in the installation grooves formed at the respective driving units.

26. The shoe of claim 22, further comprising a stopper groove arranged below the installation grooves formed in the respective supporting plates of the front and rear driving units, the links of the respective wheel assemblies being inserted into and maintained in the stopper when the shoe is used as the inline skate.

27. The shoe of claim 22, wherein the respective guide grooves of the housing comprise auxiliary grooves integrally communicating with the guide grooves, and stopper for fixing and maintaining the links of the wheel assemblies at an expanded status are integrally provided in the supporting plates of the front and rear driving units.